All dielectric metamaterials at millimeter wavelengths using single-size TiO2 resonators: Simulation and experiments

We report in this work both numerically and experimentally, a large magnetic activity using an all-dielectric metamaterial based on Mie resonances, designed to work at millimeter wavelengths over the 30-70 GHz band. We also demonstrate through numerical simulations a negative refractive index within the same investigated metamaterial intended with only one kind in size of high permittivity dielectric particles. We consider here the case of one meta-layer based on TiO₂-disks, manufactured using an inexpensive bottom-up-chemical approach. One key for achieving simultaneously a broadband magnetic response and a left-handed behavior consists to choose wisely the suitable aspect- ratio of the disks, which form the metamaterial. It is a promising step for implementing new and complex electromagnetic functions, involving cheap and easy made metamaterials for milliwave applications.